From http://www.cocos2d-x.org/forums/6/topics/14096?r=38800#message-38800

Work in progress on converting the parallax node over to csharp.
Fix for the deadlock on WP8 when the game starts.
compiles now.
it scrolls now, just need to fix bugs.
Integrating the new code into the other projects.
Content files for the projects.
Merge pull request #402 from Cocos2DXNA/PARALLAX_SCROLL_NODE

Parallax scroll node